--- /dev/null
+package jp.sourceforge.tamanegisoul.tinylock;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.res.Configuration;
+import android.media.Ringtone;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.ListPreference;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceCategory;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceManager;
+import android.preference.RingtonePreference;
+import android.text.TextUtils;
+
+import java.util.List;
+
+/**
+ * A {@link PreferenceActivity} that presents a set of application settings. On
+ * handset devices, settings are presented as a single list. On tablets,
+ * settings are split by category, with category headers shown to the left of
+ * the list of settings.
+ * <p>
+ * See <a href="http://developer.android.com/design/patterns/settings.html">
+ * Android Design: Settings</a> for design guidelines and the <a
+ * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
+ * API Guide</a> for more information on developing a Settings UI.
+ */
+public class SettingsActivity extends PreferenceActivity {
+ /**
+ * Determines whether to always show the simplified settings UI, where
+ * settings are presented in a single list. When false, settings are shown
+ * as a master/detail two-pane view on tablets. When true, a single pane is
+ * shown on tablets.
+ */
+ private static final boolean ALWAYS_SIMPLE_PREFS = false;
+
+ @Override
+ protected void onPostCreate(Bundle savedInstanceState) {
+ super.onPostCreate(savedInstanceState);
+
+ setupSimplePreferencesScreen();
+ }
+
+ /**
+ * Shows the simplified settings UI if the device configuration if the
+ * device configuration dictates that a simplified, single-pane UI should be
+ * shown.
+ */
+ private void setupSimplePreferencesScreen() {
+ if (!isSimplePreferences(this)) {
+ return;
+ }
+
+ // In the simplified UI, fragments are not used at all and we instead
+ // use the older PreferenceActivity APIs.
+
+ // Add 'general' preferences.
+ addPreferencesFromResource(R.xml.pref_general);
+
+ // Add 'notifications' preferences, and a corresponding header.
+ PreferenceCategory fakeHeader = new PreferenceCategory(this);
+ fakeHeader.setTitle(R.string.pref_header_notifications);
+ getPreferenceScreen().addPreference(fakeHeader);
+ addPreferencesFromResource(R.xml.pref_notification);
+
+ // Add 'data and sync' preferences, and a corresponding header.
+ fakeHeader = new PreferenceCategory(this);
+ fakeHeader.setTitle(R.string.pref_header_data_sync);
+ getPreferenceScreen().addPreference(fakeHeader);
+ addPreferencesFromResource(R.xml.pref_data_sync);
+
+ // Bind the summaries of EditText/List/Dialog/Ringtone preferences to
+ // their values. When their values change, their summaries are updated
+ // to reflect the new value, per the Android Design guidelines.
+ bindPreferenceSummaryToValue(findPreference("example_text"));
+ bindPreferenceSummaryToValue(findPreference("example_list"));
+ bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
+ bindPreferenceSummaryToValue(findPreference("sync_frequency"));
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public boolean onIsMultiPane() {
+ return isXLargeTablet(this) && !isSimplePreferences(this);
+ }
+
+ /**
+ * Helper method to determine if the device has an extra-large screen. For
+ * example, 10" tablets are extra-large.
+ */
+ private static boolean isXLargeTablet(Context context) {
+ return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
+ }
+
+ /**
+ * Determines whether the simplified settings UI should be shown. This is
+ * true if this is forced via {@link #ALWAYS_SIMPLE_PREFS}, or the device
+ * doesn't have newer APIs like {@link PreferenceFragment}, or the device
+ * doesn't have an extra-large screen. In these cases, a single-pane
+ * "simplified" settings UI should be shown.
+ */
+ private static boolean isSimplePreferences(Context context) {
+ return ALWAYS_SIMPLE_PREFS
+ || Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
+ || !isXLargeTablet(context);
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+ public void onBuildHeaders(List<Header> target) {
+ if (!isSimplePreferences(this)) {
+ loadHeadersFromResource(R.xml.pref_headers, target);
+ }
+ }
+
+ /**
+ * A preference value change listener that updates the preference's summary
+ * to reflect its new value.
+ */
+ private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
+ @Override
+ public boolean onPreferenceChange(Preference preference, Object value) {
+ String stringValue = value.toString();
+
+ if (preference instanceof ListPreference) {
+ // For list preferences, look up the correct display value in
+ // the preference's 'entries' list.
+ ListPreference listPreference = (ListPreference) preference;
+ int index = listPreference.findIndexOfValue(stringValue);
+
+ // Set the summary to reflect the new value.
+ preference
+ .setSummary(index >= 0 ? listPreference.getEntries()[index]
+ : null);
+
+ } else if (preference instanceof RingtonePreference) {
+ // For ringtone preferences, look up the correct display value
+ // using RingtoneManager.
+ if (TextUtils.isEmpty(stringValue)) {
+ // Empty values correspond to 'silent' (no ringtone).
+ preference.setSummary(R.string.pref_ringtone_silent);
+
+ } else {
+ Ringtone ringtone = RingtoneManager.getRingtone(
+ preference.getContext(), Uri.parse(stringValue));
+
+ if (ringtone == null) {
+ // Clear the summary if there was a lookup error.
+ preference.setSummary(null);
+ } else {
+ // Set the summary to reflect the new ringtone display
+ // name.
+ String name = ringtone
+ .getTitle(preference.getContext());
+ preference.setSummary(name);
+ }
+ }
+
+ } else {
+ // For all other preferences, set the summary to the value's
+ // simple string representation.
+ preference.setSummary(stringValue);
+ }
+ return true;
+ }
+ };
+
+ /**
+ * Binds a preference's summary to its value. More specifically, when the
+ * preference's value is changed, its summary (line of text below the
+ * preference title) is updated to reflect the value. The summary is also
+ * immediately updated upon calling this method. The exact display format is
+ * dependent on the type of preference.
+ *
+ * @see #sBindPreferenceSummaryToValueListener
+ */
+ private static void bindPreferenceSummaryToValue(Preference preference) {
+ // Set the listener to watch for value changes.
+ preference
+ .setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
+
+ // Trigger the listener immediately with the preference's
+ // current value.
+ sBindPreferenceSummaryToValueListener.onPreferenceChange(
+ preference,
+ PreferenceManager.getDefaultSharedPreferences(
+ preference.getContext()).getString(preference.getKey(),
+ ""));
+ }
+
+ /**
+ * This fragment shows general preferences only. It is used when the
+ * activity is showing a two-pane settings UI.
+ */
+ @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+ public static class GeneralPreferenceFragment extends PreferenceFragment {
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ addPreferencesFromResource(R.xml.pref_general);
+
+ // Bind the summaries of EditText/List/Dialog/Ringtone preferences
+ // to their values. When their values change, their summaries are
+ // updated to reflect the new value, per the Android Design
+ // guidelines.
+ bindPreferenceSummaryToValue(findPreference("example_text"));
+ bindPreferenceSummaryToValue(findPreference("example_list"));
+ }
+ }
+
+ /**
+ * This fragment shows notification preferences only. It is used when the
+ * activity is showing a two-pane settings UI.
+ */
+ @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+ public static class NotificationPreferenceFragment extends
+ PreferenceFragment {
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ addPreferencesFromResource(R.xml.pref_notification);
+
+ // Bind the summaries of EditText/List/Dialog/Ringtone preferences
+ // to their values. When their values change, their summaries are
+ // updated to reflect the new value, per the Android Design
+ // guidelines.
+ bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
+ }
+ }
+
+ /**
+ * This fragment shows data and sync preferences only. It is used when the
+ * activity is showing a two-pane settings UI.
+ */
+ @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+ public static class DataSyncPreferenceFragment extends PreferenceFragment {
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ addPreferencesFromResource(R.xml.pref_data_sync);
+
+ // Bind the summaries of EditText/List/Dialog/Ringtone preferences
+ // to their values. When their values change, their summaries are
+ // updated to reflect the new value, per the Android Design
+ // guidelines.
+ bindPreferenceSummaryToValue(findPreference("sync_frequency"));
+ }
+ }
+}
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